# Yaw axis

Yaw axis

Yaw axis is a vertical axis through an aircraft, rocket, or similar body, about which the body yaws; it may be a body, wind, or stability axis. Also known as yawing axis. [cite web|url=http://www.websters-online-dictionary.org/ya/yaw+axis.html|title=Specialty Definition: YAW AXIS|accessdate=2008-07-31]

The yaw axis is defined to be perpendicular to the body of the wings with its origin at the center of gravity and directed towards the bottom of the aircraft. A yaw motion is a movement of the nose of the aircraft from side to side. The pitch axis is perpendicular to the yaw axis and is parallel to the body of the wings with its origin at the center of gravity and directed towards the right wing tip. A pitch motion is an up or down movement of the nose of the aircraft. The roll axis is perpendicular to the other two axes with its origin at the center of gravity, and is directed towards the nose of the aircraft. A rolling motion is an up and down movement of the wing tips of the aircraft. cite web|url=http://www.answers.com/topic/yaw-axis|title=Yaw axis|accessdate=2008-07-31]

In planes

In flight, the control surfaces of an aircraft produce aerodynamic forces. These forces are applied at the center of pressure of the control surfaces which are some distance from the aircraft cg and produce torques (or moments) about the principal axes. The torques cause the aircraft to rotate. The elevators produce a pitching moment, the rudder produces a yawing moment, and the ailerons produce a rolling moment. The ability to vary the amount of the force and the moment allows the pilot to maneuver or to trim the aircraft.

The first aircraft to demonstrate active control about all three axes was the Wright brothers' 1902 glider [cite web|url=http://www.grc.nasa.gov/WWW/K-12/airplane/rotations.html|title=Aircraft rotations|accessdate=2008-08-04] .

ee also

*Aerodynamic
*Flight dynamics
*Tait-Bryan rotations
*Flight control surfaces
*Plane

* [http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=AD0749489 Yaw Axis Control as a Means of Improving V/STOL Aircraft Performance.]
* [http://ieeexplore.ieee.org/Xplore/login.jsp?url=/iel5/9091/28850/01297903.pdf?temp=x 3D fast walking simulation of biped robot by yaw axis moment compensation]
* [http://www.patentstorm.us/patents/6478262/claims.html Flight control system for a hybrid aircraft in the yaw axis]

References

Wikimedia Foundation. 2010.

### Look at other dictionaries:

• yaw axis — A vertical axis through an aircraft about which it yaws. Also called vertical axis, normal axis, z axis, and yawing axis …   Aviation dictionary

• Yaw — The word yaw can refer to:* Yaw angle, angle about a vertical axis **Yaw axis * Yaw (god), Levantine god * Yaw drive, wind turbine component * YAW, Halifax/Shearwater Heliport s IATA code * Ellen Beach Yaw (1869 ndash;1947), concert singer * Yàw …   Wikipedia

• yaw — [yô] vi. [ON jaga, to sway, move back and forth < or akin to Du & Ger jagen, to hunt] 1. to swing back and forth across its course, as a ship pushed by high waves 2. to swing to the left or right on the vertical axis so that the longitudinal… …   English World dictionary

• yaw — ► VERB ▪ (of a moving ship or aircraft) twist or oscillate about a vertical axis. ► NOUN ▪ yawing movement of a ship or aircraft. ORIGIN of unknown origin …   English terms dictionary

• yaw — yaw1 /yaw/, v.i. 1. to deviate temporarily from a straight course, as a ship. 2. (of an aircraft) to have a motion about its vertical axis. 3. (of a rocket or guided missile) to deviate from a stable flight attitude by oscillation of the… …   Universalium

• Yaw drive — The yaw drive is an important component in horizontal axis wind turbines. To ensure the wind turbine is producing the maximal amount of electrical energy at all times, the yaw drive is used to keep the rotor facing into the wind as the wind… …   Wikipedia

• yaw — I [[t]yɔ[/t]] v. i. 1) naut. navig. to deviate temporarily from a straight course, as a ship 2) aer. (of an aircraft) to have a motion about its vertical axis 3) rkt (of a rocket or guided missile) to deviate from a stable flight attitude by… …   From formal English to slang

• yaw — 1. noun /jɔː/ a) The rotation of an aircraft, ship, or missile about its vertical axis so as to cause the longitudinal axis of the aircraft, ship, or missile to deviate from the …   Wiktionary

• Yaw rate sensor — A yaw rate sensor is a gyroscopic device that measures a vehicle’s angular velocity around its vertical axis. The output is usually in degrees per second or radians per second. The angle between the vehicle s heading and vehicle actual movement… …   Wikipedia

• yaw — /jɔ / (say yaw) verb (i) 1. to deviate temporarily from the straight course, as a ship. 2. (of an aircraft, rocket, etc.) to have a motion about its vertical axis. –verb (t) 3. to cause to yaw. –noun 4. a movement of deviation from the direct… …